Slice your 6 butter croissants lengthwise and allow to dry out on cooling sheets while you prepare egg and milk mixture.
In a large mixing bowl, add in your eggs, milk, half and half, white sugar, brown sugar, spices, vanilla, and salt and whisk thoroughly.
Preheat electric skillet or large frying pan, add 2 tablespoons of butter and melt.
Take one slice of butter croissant and coat both sides of croissant in egg and milk mixture. Place cut side down into electric skillet. Repeat with 5 more slices and fry croissants on one side for 3-4 minutes. Once cooked, flip the croissants and fry for an additional 3-4 minutes.
Serve with toppings of choice!
Video
Notes
* If you don't have half and half or heavy cream on hand, you can substitute for whole milk.